Improper input validation in Cisco Adaptive Security Appliance
CVE-2021-34790
Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. For more information about these vulnerabilities, see the Details section of this advisory. Note: These vulnerabilities have been publicly discussed as NAT Slipstreaming.
EPSS: 0.011 (62.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.
Affected products
- Cisco Adaptive_security_appliance
- Cisco Adaptive_security_appliance_software
- Cisco Asa_5505
- Cisco Asa_5505_firmware — versions 009.008, 009.015
- Cisco Asa_5512-x
- Cisco Asa_5512-x_firmware — versions 009.008, 009.015
- Cisco Asa_5515-x
- Cisco Asa_5515-x_firmware — versions 009.008, 009.015
- Cisco Asa_5525-x
- Cisco Asa_5525-x_firmware — versions 009.008, 009.015
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34790?
- CVE-2021-34790 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, classified under CWE-358. CVSS score: 4.7/10. Published 2021-10-27.
- How severe is CVE-2021-34790?
- Medium severity. CVSS v3 base score is 4.7 out of 10.